How do I ensure abilities *do* change whe evolving?

[nihilism]

I haven't copied my pokemon across yet but I wanted to make sure the poekmon would work the way I wanted before spening hours levelling only to find that the pokemon is stuck with the lesser ebility chosen in pokegen.

Eg. If I want a Gyarados ( and I want to raise it myself ). If I transfer a magikarp with the IVs I want and give it the ability 'Swift swim'; which is magikarps default ability.

Will the ability change to intimidate when evolving?

With pokemon that have 2 abilities on evolution. Is there any way to ensure which ability they get when evolving.

I understand that I could just copy fully evolved pokemon with any ability I want...but I want to train and evolve them myself.

Thanks for reading and any help would be appreciated.

[Codr]

The PID determines which ability is given to the Pokemon upon evolving. Using the PID Finder with the target game set appropriately will yield one that does what you want.